WO2007123058A1 - Motor - Google Patents

Motor Download PDF

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Publication number
WO2007123058A1
WO2007123058A1 PCT/JP2007/058133 JP2007058133W WO2007123058A1 WO 2007123058 A1 WO2007123058 A1 WO 2007123058A1 JP 2007058133 W JP2007058133 W JP 2007058133W WO 2007123058 A1 WO2007123058 A1 WO 2007123058A1
Authority
WO
WIPO (PCT)
Prior art keywords
teeth
stator yoke
stator
motor according
rotor
Prior art date
Application number
PCT/JP2007/058133
Other languages
English (en)
Japanese (ja)
Inventor
Yuichi Yoshikawa
Hiroshi Murakami
Yukinori Nakagawa
Masahiko Morisaki
Hu Li
Original Assignee
Panasonic Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to CN2007800039692A priority Critical patent/CN101375486B/zh
Priority to JP2008512092A priority patent/JP5287241B2/ja
Publication of WO2007123058A1 publication Critical patent/WO2007123058A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets

Definitions

  • the present invention relates to a twin rotor type brushless motor, and more particularly to a configuration in which a stator is provided with a mold resin.
  • FIG. 4 is a cross-sectional view of a conventional toroidal brushless motor having a twin rotor.
  • FIG. 5 is a cross-sectional view showing a 5-5 cross section in FIG.
  • This conventional motor includes a stator 110, an inner rotor 120, and an outer rotor 130.
  • Stator 110 includes a stator core 111 and a coil 115.
  • the stator core 111 is powered by the stator yoke 114 and the outer teeth 112 and the inner teeth 113 provided on the stator yoke 114, and the outer slot 116 is interposed between the outer teeth 112 and the inner teeth 113.
  • the inner slots 117 are respectively configured.
  • the stator yoke 114 is provided with a plurality of toroidal three-phase coils 115. This coil 115 is wound around the stator yoke 114 by a concentrated winding method, and is housed in an outer slot 116 and an inner slot 117, and is star-connected or delta-connected.
  • the inner rotor 120 is directly connected to the rotary shaft 129 and is rotatably held inside the stator 110.
  • the inner rotor 120 further includes an inner rotor frame 123, an inner rotor yoke 121, and an inner permanent magnet 122.
  • the outer rotor 130 is directly connected to the rotating shaft 129 and is rotatably held outside the stator 110.
  • the outer rotor 130 further includes an outer rotor frame 133, an outer rotor yoke 131, and an outer permanent magnet 132.
  • FIG. 4 shows a surface magnet type rotor in which permanent magnets 122 and 132 are provided on the surfaces of the rotor cores 121 and 131, respectively.
  • the configuration of such a toroidal motor is disclosed in Patent Document 1, for example.
  • the stator 110 is sealed with the mold resin 150 after the winding of the coil 115 is completed.
  • the coil 115 is firmly fixed to the stator core 111 to improve moisture resistance and drip resistance. It is.
  • the coil 115 is integrally formed with the mold resin 150, the outer slot 116, the inner slot 117, the first surface 141 of the stator yoke 114 (upper side in FIG. 5), and the second surface 142 of the stator yoke 114 (FIG. 5).
  • the lower side of the paper is filled with mold resin 150.
  • the mold grease on the first surface 141 of the stator yoke 114 and the mold grease on the second surface 142 are divided between the slot open portion (slot entrance) of the outer slot 116 and the inner surface.
  • the side slot 117 is connected only at the slot open portion. Therefore, unless the slot opening is enlarged and the amount of the mold resin 150 is increased, the mold resin on the first surface 141 and the mold resin on the second surface 142 are peeled off. There were challenges. Also, enlarging the slot open portion to avoid this separation is not preferable because it leads to an increase in cogging torque and a decrease in motor efficiency. As described above, there is a problem that it is difficult to perform an optimal motor design while avoiding peeling of the mold resin.
  • Patent Document 1 Japanese Patent Application JP 2001-37133
  • the motor of the present invention has the following configuration.
  • a stator core having an annular stator yoke, a plurality of outer teeth projecting outward in the radial direction of the stator yoke force, and a plurality of inner teeth projecting inward in the stator yoke force radial direction in the same number as the outer teeth;
  • a stator having a plurality of coils wound around the stator core.
  • an outer rotor having an outer permanent magnet opposed to the outer teeth via a gap and an inner rotor having an inner permanent magnet opposed to the inner teeth via the gap are included.
  • the stator core has an outer slot formed between the outer teeth and an inner slot formed between the inner teeth, and the coil is a stay between the outer slot and the inner slot. It is a toroidal coil wound around a tayok and connected in a three-phase star or delta shape.
  • the stator yoke includes a through hole penetrating the first surface and the second surface, and the outer slot, the inner slot, the first surface, the second surface, and the through hole are provided. It is equipped with a mold resin that is integrally molded.
  • the motor of the present invention having this configuration achieves small size, large torque, high efficiency, low cogging torque, and low cost, and uses mold resin filled in the first surface and the second surface. It can be firmly connected to prevent peeling.
  • FIG. 1 is a cross-sectional view of a motor in an embodiment of the present invention.
  • FIG. 2 is a sectional view showing a section 2-2 in FIG.
  • FIG. 3 is a graph showing a relationship between motor slot opening and cogging torque in the embodiment of the present invention.
  • FIG. 4 is a sectional view of a conventional motor.
  • FIG. 5 is a cross-sectional view showing a 5-5 cross section in FIG.
  • FIG. 1 is a cross-sectional view of a toroidal brushless motor having a twin rotor according to an embodiment of the present invention.
  • FIG. 2 is a sectional view showing a section 2-2 in FIG.
  • the motor according to the present embodiment includes a stator 10, an inner rotor 20 that faces the inner diameter side of the stator 10, and an outer rotor 30 that faces the outer diameter side.
  • the stator core 11 constituting the stator 10 includes a substantially annular stator yoke 14, an outer tooth 12 in which the stator yoke 14 also projects in the outer circumferential direction, and the same number of outer teeth 12 projecting from the stator yoke 14 in the inner circumferential direction. It consists of 13 inner teeth. Between each outer tooth 12, there is an outer slot 16 force. Between each inner tooth 13, there is an inner slot 17 force. The coils are wound in a concentrated winding system on the stator yoke 14 between the outer slot 16 and the inner slot 17 and a plurality of coils 15 force S connected in a three-phase star or delta shape.
  • An outer rotor 30 is disposed facing the outer teeth 12 via a predetermined air gap.
  • the inner rotor 20 is disposed facing the inner teeth 13 via a predetermined air gap.
  • the outer rotor 30 is configured such that an outer rotor yoke 31 is fixed to the inner diameter side of the outer rotor frame 33 and a ring-shaped outer permanent magnet 32 is fixed to the inner diameter side thereof.
  • the outer rotor frame 33 and the outer rotor yoke 31 are coupled by means such as press fitting, shrink fitting, or adhesion.
  • the outer rotor yoke 31 is laminated with magnetic steel sheets punched into a predetermined shape. Thus, a magnetic circuit is configured.
  • the inner rotor 20 is configured such that an inner rotor yoke 21 is fixed to the outer diameter side of the inner rotor frame 23 and a ring-shaped inner permanent magnet 22 is fixed to the outer diameter side thereof.
  • the inner rotor frame 23 and the inner rotor yoke 21 are coupled by means such as press fitting, shrink fitting, or adhesion.
  • the inner rotor yoke 21 is formed by laminating electromagnetic steel plates punched into a predetermined shape to constitute a magnetic circuit.
  • the inner rotor frame 23 and the outer rotor frame 33 are connected to the rotating shaft 29 and rotate integrally by applying a predetermined current to the coil 15.
  • the motor according to the present embodiment includes the inner rotor 20 and the outer rotor 30, so that higher torque and higher output can be realized as compared with a general inner-compartment motor or outer rotor motor.
  • stator 10 of the motor of the present embodiment is integrally formed with a mold resin 50 after winding the coil 15 times. This is to fix the coil 15 to the stator core 11 and further improve the moisture and drip proof functions.
  • the stator yoke 14 of the stator core 11 is provided with a plurality of through holes 18 penetrating in the axial direction.
  • the coil 15 is integrally formed with the mold grease 50
  • the outer slot 16, the inner slot 17, the first surface 41 of the stator yoke 14 (upper side in FIG. 2), and the second surface 42 of the stator yoke 14 (see FIG. 2) and the through hole 18 are filled with the mold resin 50.
  • the mold resin 50 on the first surface 41 of the stator yoke 14 and the mold resin 50 on the second surface 42 are connected by the mold resin 50 filled in the through hole 18. .
  • the mounting portion 51 is molded into a body by being connected to the mold resin 50 molded on the second surface 42.
  • the mounting portion 51 is used for mounting other parts and mounting the motor to equipment.
  • the plurality of through holes 18 are intersections of a straight line 61 passing through the center of rotation and the central arc 62 of the stator yoke 14 connecting the center of the outer teeth 12 in the rotational direction and the center of the inner teeth 13 in the rotational direction.
  • the cross-sectional shape of the through hole 18 is preferably a circle or an ellipse.
  • the radial length of the through hole 18 is L, which is the radial length of the stator yoke 14.
  • the stator yoke 14 may become magnetically saturated, and the motor torque may be reduced.
  • the diameter of the through hole 18 is smaller than this number, the flow of the mold resin becomes worse at the time of molding and the strength is lowered.
  • the cross-sectional shape of the through hole 18 can be appropriately adopted, such as a quadrangle, a rectangle, or a triangle.
  • the mold resin 50 is preferably an unsaturated polyester containing a filler. This is because the fluidity and strength during molding are excellent.
  • FIG. 3 is a diagram showing the relationship between the tooth tip width and the cogging torque.
  • the broken line indicates the relationship between the tooth tip width of the inner teeth 13 and the cogging torque when it is assumed that only the inner rotor 20 exists.
  • the solid line shows the relationship between the tooth tip width of the outer teeth 12 and the cogging torque when it is assumed that only the outer rotor 30 exists.
  • the mold resin 50 filled on the second surface 42 it is possible to realize their strong fixing force. This is especially effective when the slot open length is reduced to reduce cogging torque.
  • the through hole 18 is provided at a position corresponding to all the inner and outer teeth 13, 12 at equal intervals on the stator yoke 14 corresponding to the inner and outer teeth 13, 12. It does not have to be.
  • the number of through holes 18 may be reduced by thinning out appropriately.
  • the force showing the configuration of 20 poles and 12 coils can also be applied to other configurations such as a configuration of 12 poles and 18 coils.
  • the present invention can be applied to a so-called embedded magnet type motor (IPM motor), in which a permanent magnet is embedded in a rotor yoke.
  • IPM motor embedded magnet type motor
  • the present invention is useful for motors that are small in size and limited in space, such as home appliances and electrical components, and that require high output, high efficiency, and low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Windings For Motors And Generators (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

La présente invention concerne un moteur qui comporte un stator qui comprend un noyau de stator qui possède une culasse de stator annulaire, une pluralité de dents extérieures qui font saillie à partir de la culasse de stator vers le côté extérieur, et de dents intérieures au même nombre que les dents extérieures et qui font saillie à partir de la culasse de stator vers le côté intérieur et une pluralité de bobines enroulées autour du noyau de stator. Le moteur comprend en outre un rotor intérieur et un rotor extérieur qui font face aux dents intérieures et extérieures avec des espaces formés entre ceux-ci. La culasse de stator possède des trous débouchants qui s'étendent à travers une première surface et une seconde surface et une résine de moulage pour mouler des fentes extérieures, fentes intérieures, la première surface, la seconde surface, et les trous débouchants solidairement les uns des autres.
PCT/JP2007/058133 2006-04-18 2007-04-13 Motor WO2007123058A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2007800039692A CN101375486B (zh) 2006-04-18 2007-04-13 电动机
JP2008512092A JP5287241B2 (ja) 2006-04-18 2007-04-13 モータ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-114179 2006-04-18
JP2006114179 2006-04-18

Publications (1)

Publication Number Publication Date
WO2007123058A1 true WO2007123058A1 (fr) 2007-11-01

Family

ID=38624959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/058133 WO2007123058A1 (fr) 2006-04-18 2007-04-13 Motor

Country Status (3)

Country Link
JP (1) JP5287241B2 (fr)
CN (1) CN101375486B (fr)
WO (1) WO2007123058A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102324820A (zh) * 2011-08-17 2012-01-18 浙江大学 磁场调制型多功率端口永磁电机
WO2014068927A1 (fr) * 2012-11-05 2014-05-08 パナソニック株式会社 Ventilateur de plafond
US20150001971A1 (en) * 2008-09-23 2015-01-01 Aerovironment, Inc. Stator winding heat sink configuration
CN113890304A (zh) * 2021-10-20 2022-01-04 三峡大学 一种具有凸型Halbach阵列和Spoke结构的磁力齿轮

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0279167U (fr) * 1988-11-30 1990-06-18
JP2001037133A (ja) * 1999-07-23 2001-02-09 Matsushita Electric Ind Co Ltd ステータ及び電動機

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5381301U (fr) * 1976-12-08 1978-07-06
JPS53157302U (fr) * 1977-05-18 1978-12-09
JPS61293136A (ja) * 1985-06-19 1986-12-23 Matsushita Electric Ind Co Ltd モ−タ−固定子およびその製造方法
JPH09163697A (ja) * 1995-12-08 1997-06-20 Fujitsu General Ltd 電動機
JPH10271782A (ja) * 1997-03-28 1998-10-09 Matsushita Electric Ind Co Ltd 電動機
JPH1143521A (ja) * 1997-05-30 1999-02-16 Matsushita Electric Ind Co Ltd モールド組成物、モールド部品およびモールド部品の製造方法
JP3902346B2 (ja) * 1998-11-30 2007-04-04 三洋電機株式会社 集中巻方式のブラシレスｄｃモータ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0279167U (fr) * 1988-11-30 1990-06-18
JP2001037133A (ja) * 1999-07-23 2001-02-09 Matsushita Electric Ind Co Ltd ステータ及び電動機

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150001971A1 (en) * 2008-09-23 2015-01-01 Aerovironment, Inc. Stator winding heat sink configuration
US9748809B2 (en) * 2008-09-23 2017-08-29 Aerovironment, Inc. Stator winding heat sink configuration
US10103592B2 (en) 2008-09-23 2018-10-16 Aerovironment, Inc. Stator winding heat sink configuration
US11581769B2 (en) 2008-09-23 2023-02-14 Aerovironment, Inc. Stator winding heat sink configuration
CN102324820A (zh) * 2011-08-17 2012-01-18 浙江大学 磁场调制型多功率端口永磁电机
WO2014068927A1 (fr) * 2012-11-05 2014-05-08 パナソニック株式会社 Ventilateur de plafond
JPWO2014068927A1 (ja) * 2012-11-05 2016-09-08 パナソニックＩｐマネジメント株式会社 天井扇風機
CN113890304A (zh) * 2021-10-20 2022-01-04 三峡大学 一种具有凸型Halbach阵列和Spoke结构的磁力齿轮

Also Published As

Publication number Publication date
JP5287241B2 (ja) 2013-09-11
JPWO2007123058A1 (ja) 2009-09-03
CN101375486A (zh) 2009-02-25
CN101375486B (zh) 2012-02-01

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